Urethane balls have been around for so long, and gone through different stages in development, I think people get confused by the term.
I've thrown so many of these, Natural, Natural Pear, Super Natural, Blue Hammer, Crow, Pitch Black, Purple hammer, Badger Infused, Covert Tank, Blue Tank, Fever Pitch, Boo-yah Pro.
1) Original urethane from 1980's - I guess this is "traditional" urethane. Goes straight
2) Second generation: updated urethane - Storm's natural line, Blue Hammer re-release. More kick than 80's urethane, but still straight for dry or short oil only.Yes, these are dry lane balls.
3) Third generation: Pitch Black, Purple Hammer, Fast Pitch. Significantly stronger than previous urethane. No longer suitable for dry lanes. Best on short oil.
4) Forth generation of "urethane" like balls. As strong as reactive. For control in oil. Nothing like previous generations of urethane. Rubicon UC3, Zen U, Motiv MCP balls. Boo-yah Pro. Not for short oil only anymore! For control on a variety of lane conditions. Boo-hay Pro was like some super urethane thing - came out at wrong time and totally under the radar. Just a matter of time b/f Storm brought out more like it, with better timing and publicity.
A Motiv MCP is very different from Pitch Black. Not replaceable with MCP. If you want a Pitch Black reaction, you have to buy a Pitch Black. I've thrown Pitch Black and 2 MCP balls. They are nothing like each other.
People need to stop lumping all these ball together. It's like saying all solid reactive balls are the same.